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Alibaba Exam ACA-Cloud1 Topic 5 Question 79 Discussion

Actual exam question for Alibaba's ACA-Cloud1 exam
Question #: 79
Topic #: 5
[All ACA-Cloud1 Questions]

Cloud disks are reliable because they use_________ to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.

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Suggested Answer: A, C

OSS object types are the storage classes that define the performance and cost of storing objects in OSS.OSS supports four object types: Standard, Infrequent Access (IA), Archive, and Cold Archive1.Each object type has different characteristics and scenarios, such as availability, durability, minimum storage duration, and storage overhead2.

Object lifecycle management is a feature that allows you to manage objects efficiently and minimize costs throughout the lifecycle of the objects in your bucket. Lifecycle settings create a set of rules that help define the actions that an OSS bucket must perform on a group of objects.For example, you can configure lifecycle rules to automatically delete expired objects, or convert the storage class of objects to a lower-cost object type3.

You can configure lifecycle rules based on the object type of the objects in your bucket. You can specify the object type as a parameter for the lifecycle rule, and OSS will apply the rule to the objects that match the object type.For example, you can create a lifecycle rule to convert the object type of objects from Standard to IA after 30 days, and then to Archive after 180 days4.

Therefore, the correct answer is A. Infrequent access and C. Archive, as these are two of the object types that can be configured as parameters for object lifecycle management. B. Snapshot and D.Chunk are not valid object types in OSS.Reference:1:Overview of object types - Object Storage Service - Alibaba Cloud Documentation Center2:Object Storage Service (OSS) - Alibaba Cloud3:Manage Your OSS Storage Costs Using Lifecycle Policies - Alibaba Cloud4:Lifecycle rules based on the last modified time - Object Storage Service - Alibaba Cloud Documentation Center.


by Glory at Nov 13, 2024, 12:16 PM

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Dwight
3 days ago
Wow, 99.9999999% data reliability? That's like, what, a one in a billion chance of data loss? I'm sold on the cloud disks!
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Lilli
7 days ago
I'm not sure, but I think it might be C) a double copy distributed system. It also sounds reliable to me.
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Nickolas
10 days ago
I agree with Talia, because having 3 redundant copies ensures high data reliability.
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Talia
13 days ago
I think the answer is A) a distributed file management system with 3 redundant copies.
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